From: Muli Ben-Yehuda <muli@il.ibm.com>
To: Avi Kivity <avi@qumranet.com>
Cc: Amit Shah <amit.shah@qumranet.com>,
kvm@vger.kernel.org, anthony@codemonkey.ws,
jesse.barnes@intel.com, david.woodhouse@intel.com,
mark.gross@intel.com, Ben-Ami Yassour1 <BENAMI@il.ibm.com>,
weidong.han@intel.com
Subject: Re: VT-d support for device assignment
Date: Sat, 23 Aug 2008 12:50:25 +0300 [thread overview]
Message-ID: <20080823095025.GA6942@il.ibm.com> (raw)
In-Reply-To: <48AFD97A.30309@qumranet.com>
On Sat, Aug 23, 2008 at 12:33:46PM +0300, Avi Kivity wrote:
> So long as there is no potential for performance or security impact,
> having pvdma turned on automatically is better. We could still have
> dma=noparavirt to disable it.
pvdma has advantages and disadvantages. It has a significant
performance impact (compared to direct map) but it also let us avoid
pinning all of the guest's memory. I this this should be a guest
decision whether to use it or not, so 'dma=noparavirt' to disable it
seems reasonable.
Cheers,
Muli
--
Workshop on I/O Virtualization (WIOV '08)
Co-located with OSDI '08, Dec 2008, San Diego, CA
http://www.usenix.org/wiov08
next prev parent reply other threads:[~2008-08-23 9:50 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-22 7:10 VT-d support for device assignment Amit Shah
2008-08-22 7:10 ` [PATCH] VT-d: changes to support KVM Amit Shah
2008-08-22 7:10 ` [PATCH] KVM: Device Assignment with VT-d Amit Shah
2008-08-23 16:21 ` [PATCH] VT-d: changes to support KVM Jesse Barnes
2008-08-22 13:54 ` VT-d support for device assignment Byron Stanoszek
2008-08-22 15:32 ` Amit Shah
2008-08-22 18:29 ` Muli Ben-Yehuda
2008-08-22 18:37 ` Avi Kivity
2008-08-22 19:09 ` Muli Ben-Yehuda
2008-08-22 16:08 ` Muli Ben-Yehuda
2008-08-22 18:12 ` Avi Kivity
2008-08-22 18:23 ` Muli Ben-Yehuda
2008-08-22 18:21 ` Avi Kivity
2008-08-22 18:28 ` Muli Ben-Yehuda
2008-08-23 9:12 ` Amit Shah
2008-08-23 9:33 ` Avi Kivity
2008-08-23 9:49 ` Amit Shah
2008-08-24 10:01 ` Avi Kivity
2008-08-23 9:50 ` Muli Ben-Yehuda [this message]
2008-08-23 9:55 ` Muli Ben-Yehuda
2008-08-24 10:02 ` Avi Kivity
2008-08-23 9:57 ` Muli Ben-Yehuda
2008-08-23 10:25 ` Amit Shah
2008-08-23 10:40 ` Muli Ben-Yehuda
2008-08-23 11:11 ` Amit Shah
2008-08-23 12:11 ` Muli Ben-Yehuda
2008-08-23 14:01 ` Amit Shah
2008-09-01 13:08 ` Joerg Roedel
-- strict thread matches above, loose matches on Subject: below --
2008-09-09 15:37 Amit Shah
2008-09-14 0:46 ` Avi Kivity
2008-09-23 18:57 ` Jesse Barnes
2008-09-09 14:44 Amit Shah
2008-09-09 13:50 Han, Weidong
2008-08-26 8:55 Amit Shah
2008-08-26 9:10 ` Avi Kivity
2008-08-26 14:11 ` Amit Shah
2008-08-26 14:38 ` Avi Kivity
2008-08-21 11:10 Ben-Ami Yassour
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